US 2006/0032058 A1Published application

Tool for surface burring

OwnerWinston MacKelvieinventor

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Abstract

A tool for burring the surface of a material. The tool has two sets of oppositely facing toothed blades which are made to move towards each other when the tool is pressed against a surface. Each tooth planes a shallow groove into the surface which results in hook-like burrs or planings rising from each groove. Limiters on the blade stroke ensure that the raised burr is not severed. A spring returns the blades to their start position. The resulting surface therefore has a plurality of shallow, non-piercing stopped grooves with a like plurality of hook-like burrs. Such a modified surface provides increased surface area for electrochemical activity, and a mechanical grip to materials bonded thereto. The tool uses replaceable blade packs which snap into a permanent tool housing. The tool may be operated with a simple hammer blow or it may be rapidly driven into large or samll areas of a surface by a manual and/or computer directed punch press.

Claims6

Dependent claims

An apparatus for modifying a generally planar surface of a work piece, said apparatus comprising:

first and second sets of blades, each blade comprising a generally planar blade member having a body portion and a plurality of teeth at the bottom of said body portion, said teeth presenting cutting edges to a surface, said first set of blades having teeth extending in a first longitudinal direction, said second set of blades extending in an opposite longitudinal direction;
biasing means urging said first set of blades apart from said second set of blades in the longitudinal axis direction;
a retaining member for retaining said blades in a side by side relationship and for retaining said biasing means;
a first actuator extending through said retaining member and through said body portions of said first set of blades;
a second actuator extending through said retaining member and through said body portions of said second set of blades;
and
a housing member designed to receive said blades, said retaining member, and said first and second actuators, said housing member having means for guiding said actuators such that upon a force being exerted on said housing member, said actuators cause said blades to move in opposite directions.

4 more elements

Dependencies are inferred from the claim text.